Alert archive / Louisiana / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 71, NWS Shreveport, LA
NWS Shreveport, LA issued this severe thunderstorm warning at May 4, 1989, 9:42 AM CDT for 4 parishes in Louisiana. It was in force for 93 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 4, 1989, 9:42 AM CDT (14:42 UTC)
- Expired
- May 4, 1989, 11:15 AM CDT
- In force
- 93 min
- Issued by
- NWS Shreveport, LA
- Area
- Whole counties
Counties Lincoln Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 4, 9:55 AM CDT | Thunderstorm Wind 0 | Richland, LA | |
| May 4, 10:48 AM CDT | Hail 1 | Richland, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Jackson, MS (KJAN), launched 12:00Z, 2.7 hours before the alert went out and 191 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 174 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 563 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 330 m²/s²
- 0-3 km storm-relative helicity
- 315 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 4, 3:43 AM CDT, 5 hours 59 minutes before
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<div class="status" id="status">Temporary Notice</div>
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 8:03 AM CDT | Severe Thunderstorm Warning | SHV | Union | 57 min |
| May 4, 8:21 AM CDT | Severe Thunderstorm Warning | SHV | Morehouse, Ouachita | 69 min |
| May 4, 8:30 AM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 60 min |
| May 4, 8:30 AM CDT | Severe Thunderstorm Warning | SHV | Webster | 60 min |
| May 4, 8:41 AM CDT | Severe Thunderstorm Warning | SHV | Richland | 94 min |
| May 4, 9:42 AM CDT | Severe Thunderstorm Warning | SHV | East Carroll, West Carroll | 93 min |
| May 4, 9:50 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, De Soto, Natchitoches, Red River, Sabine | 100 min |
| May 4, 10:21 AM CDT | Severe Thunderstorm Warning | SHV | Franklin, Madison, Tensas | 99 min |
| May 4, 10:21 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell | 99 min |
| May 4, 7:01 AM CDT | Severe Thunderstorm Warning | SHV | Bowie | 84 min |
| May 4, 7:01 AM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Little River, Miller | 84 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1989Every severe thunderstorm warning in 1989
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.